- Havasu NWR is bisected by the Colorado River and lies within the Mojave Desert. The refuge includes a large man-made marsh, beautiful backwater areas adjacent to the Colorado River surrounded by high and curved mountain peaks and cliffs, riverine rock, gravel strewn hills, and sand dunes.
These different land and aquatic areas with their associated mixes of vegetation provide a multitude of habitats and a variety of ecosystems within the harsh desert environment. Neotropical birds, including the endangered Southwestern Willow Flycatcher, frequent riparian areas, and waterfowl visit the refuge during fall and winter. Marsh dwelling birds live year-round throughout the area, including the endangered Yuma clapper rail. A large number of reptiles and amphibians can be seen as well as desert bighorn sheep. Thousands of people come to the refuge during the spring and summer months.
Recreation - Recreation activities include boating along the Colorado River.
Climate - The climate in California desert areas is typically clear with low humidity. Temperatures are most comfortable in the spring and fall, with an average high/low of 85 and 50 F respectively. Winter brings cooler days, around 60 F, and freezing nights. It occasionally snows at higher elevations. Summers are hot, over 100 F during the day and not cooling much below 75 F until the early hours of the morning.